Date A Live Season 1 adapts the first 4 novels of Koushi Tachibana's light novel series of the same name.
The anime premiered on March 31, 2013 on Niconico. On TV, it premiered on April 6, 2013 on Tokyo MX. The Blu-ray Box features an additional 35 minutes worth of content. Due to the Blu-ray Box being released after FUNimation Entertainment's release, this additional material was not included in any English release.
Based on the light novel series written by Tachibana Koushi and illustrated by Tsunako.